Abstract
The by-catch fauna of the shrimp fishery includes a number of marine invertebrates that are discarded because they do not have commercial value. In order to try to add some value to these materials, we analyzed the chemical composition of the starfish Luidia senegalensis collected in the Brazilian coast as a consequence of the trawling fishery method. In order to access their chemical composition, we used a combination of solid phase extraction (SPE) followed by ultra-high performance liquid chromatography coupled to electrospray ionization ion trap tandem mass spectrometry (UPLC-ESI-IT-MSn). Luidia senegalensis contains asterosaponins, which are sulphated glycosilated steroids, containing five and six sugar moieties, in addition to polyhydroxysteroids. This study helped us to support the presence of important and potentially bioactive compounds in invertebrates associated to the by-catch fauna of the shrimp fishery, using a fast and efficient method.Graphical
Highlights
Waste of resources from biodiversity is huge in Brazil and worldwide
We assessed the chemical profile of the saponins of the starfish Luidia senegalensis collected as bycatch fauna of the shrimp fishery in Brazil, as a result of trawling employed by traditional fishers, who use to discard these organisms
The putative structure of the saponins detected in L. senegalensis were associated mainly with those found in Aphelasterias japonica [7], Asterias rubens [8], L. maculata [9] and in L. quinaria [10], besides those described in the review published by Dong et al [6]
Summary
Waste of resources from biodiversity is huge in Brazil and worldwide. The broad variety of marine organisms (algae, mollusks, sponges, corals, etc.) that are caught together with fish and shrimp is completely ignored as a source of new molecules. We investigate the chemical compounds present in the by-catch fauna of the shrimp fishery on the coast of State Sao Paulo, Brazil, in order to obtain molecules of potential economic interest, which can increase the value of this wasted material. To start our work on the chemical composition of the by-catch fauna of the shrimp fishery, we have investigated the polar extract of the nine-armed starfish Luidia senegalensis Lamark collected in the coast of the Sao Paulo State, Brazil. Asterias senegalensis Lamarck (1816), Luidia marcgravii Steenstrup in Lutken (1859, synonym according to Perrier (1875)] occurs at depths of up to 40 meters alongside the coast of South America, including southern Brazil, as well as around the coasts of Florida, in the Caribbean Sea and the Gulf of Mexico [4]
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